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From GitBox <...@apache.org>
Subject [GitHub] rdhabalia commented on a change in pull request #2400: PIP-22: Dead Letter Topic
Date Fri, 24 Aug 2018 01:01:01 GMT
rdhabalia commented on a change in pull request #2400: PIP-22: Dead Letter Topic
URL: https://github.com/apache/incubator-pulsar/pull/2400#discussion_r212497283
 
 

 ##########
 File path: pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentDispatcherMultipleConsumers.java
 ##########
 @@ -132,11 +156,44 @@ public synchronized void addConsumer(Consumer consumer) throws BrokerServiceExce
             throw new ConsumerBusyException("Subscription reached max consumers limit");
         }
 
+        deadLetterTopicProducer = newDeadLetterProducer();
+
         consumerList.add(consumer);
         consumerList.sort((c1, c2) -> c1.getPriorityLevel() - c2.getPriorityLevel());
         consumerSet.add(consumer);
     }
 
+    private ProducerImpl<byte[]> newDeadLetterProducer() throws BrokerServiceException
{
+        if (maxRedeliveryCount > 0 && deadLetterTopicProducer == null) {
+            try {
+                if (maxRedeliveryCount > 0 && StringUtils.isBlank(deadLetterTopic))
{
+                    deadLetterTopic = String.format("%s-%s-DLQ", topic.getName(), Codec.decode(cursor.getName()));
 
 Review comment:
   what if tenant already has topic with postfix `DLQ`?

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